I've done a lot of searching on this topic, and seems to be a few different ways this can be wired. So, I'm just going to spit out my plan, and see if you all see any problems with it. I'm running my fpss in normal config: relay - fpss - ground. I plan to mount the window switch in the glove box so would rather not have to string another wire across the engine bay into the cab. So can I safely hook up the window switch up to the nitrous on switch and then ground inside the car? Will still give me the desired effect?

The only concern I have is I plan to install some LED lights in the cab which I want to illuminate when the nitrous system is armed, not when it is spraying. I know I read a post somewhere about how someone had wired up there window switch which only illuminated the led when it was spraying, not sure if it was this config or not.